<template>
  <div v-if="isShow">
    <el-row :gutter="10" style="margin-bottom: 20px;">

      <el-col :span="6">
        <el-card  style="color: #409EFF">
          <div><i class="el-icon-user-solid">用户总数</i></div>
          <div style="padding: 10px 0; text-align: center; font-weight: bold">
            100
          </div>
        </el-card>
      </el-col>

      <el-col :span="6">
        <el-card style="color: #67c23a">
          <div><i class="el-icon-user-solid">教师总数</i></div>
          <div style="padding: 10px 0; text-align: center; font-weight: bold">
            50
          </div>
        </el-card>
      </el-col>

      <el-col :span="6">
        <el-card style="color: #ee66aa">
          <div><i class="el-icon-user-solid">课程总数</i></div>
          <div style="padding: 10px 0; text-align: center; font-weight: bold">
            100
          </div>
        </el-card>
      </el-col>

      <el-col :span="6">
        <el-card  style="color: #e6a23c">
          <div><i class="el-icon-user-solid">文件数量</i></div>
          <div style="padding: 10px 0; text-align: center; font-weight: bold">
            8
          </div>
        </el-card>
      </el-col>

    </el-row>

    <el-row>
      <el-col :span="12">
        <div id="main" style="width: 500px; height: 450px; margin-top: 60px" ></div>
      </el-col>

      <el-col :span="12">
        <div id="pie" style="width: 500px; height: 400px; margin-top: 60px"></div>
      </el-col>
    </el-row>

  </div>
</template>

<script>
import * as echarts from 'echarts'

export default {
  name: "Home",
  data() {
    return {
      isShow:localStorage.getItem("user")
    }
  },
  mounted() {    // 页面元素渲染之后再触发

    //折线图
    var option = {
      title: {
        text: '各季度教师数量统计',
        subtext: '趋势图',
        left: 'center'
      },
      tooltip: {
        trigger: 'item'
      },
      legend: {
        orient: 'vertical',
        left: 'left'
      },
      xAxis: {
        type: 'category',
        data: ["第一季度", "第二季度", "第三季度", "第四季度"]
      },
      yAxis: {
        type: 'value'
      },
      series: [
        {
          //line表示折线图，bar表示柱状图
          name:"教师数量",
          data: [],
          type: 'line'
        },
        {
          name:"教师数量",
          data: [],
          type: 'bar'
        },

/*        {
          name:"瑞幸",
          data: [],
          type: 'line'
        },
        {
          name:"瑞幸",
          data: [],
          type: 'bar'
        },*/

      ]
    };

    var chartDom = document.getElementById('main');
    var myChart = echarts.init(chartDom);

    this.request.get("/echarts/members").then(res => {
      //option.xAxis.data = res.data.x
      //option.series[0].data = res.data.y
      //星巴克
      option.series[0].data = res.data
      option.series[1].data = res.data

/*      //瑞幸
      option.series[2].data = [5,6,7,8]
      option.series[3].data = [5,6,7,8]*/
      //数据准备完毕之后再set
      myChart.setOption(option);
    })



    //饼图
    var pieOption = {
      title: {
        text: '各学期教师数量统计',
        subtext: '比例图',
        left: 'center'
      },
      tooltip: {
        trigger: 'item',
        formatter: '{a} <br/>{b} : {c} ({d}%)'//展示比例大小
      },
      legend: {
        orient: 'vertical',
        left: 'left'
      },
      series: [
        {
          //星巴克
          name: "教师数量",
          type: 'pie',
          radius: '75%',
          center: ['55%', '60%'],//饼图位置
          label:{            //饼图图形上的文本标签
            normal:{
              show:true,
              position:'inner', //标签的位置
              textStyle : {
                fontWeight : 300 ,
                fontSize : 14,    //文字的字体大小
                color: "#fff"
              },
              formatter:'{d}%'
            }
          },
          data: [],  // 填空
          emphasis: {
            itemStyle: {
              shadowBlur: 10,
              shadowOffsetX: 0,
              shadowColor: 'rgba(0, 0, 0, 0.5)'
            }
          }
        },

/*         //瑞幸
        {
          name: "瑞幸",
          type: 'pie',
          radius: '55%',
          center: ['75%', '60%'],
          label:{            //饼图图形上的文本标签
            normal:{
              show:true,
              position:'inner', //标签的位置
              textStyle : {
                fontWeight : 300 ,
                fontSize : 14,    //文字的字体大小
                color: "#fff"
              },
              formatter:'{d}%'
            }
          },
          data: [ {name: "第一季度", value: 5},
                  {name: "第二季度", value: 6},
                  {name: "第三季度", value: 7},
                  {name: "第四季度", value: 8},
          ],
          emphasis: {
            itemStyle: {
              shadowBlur: 10,
              shadowOffsetX: 0,
              shadowColor: 'rgba(0, 0, 0, 0.5)'
            }
          }
        }*/
      ]
    };

    var pieDom = document.getElementById('pie');
    var pieChart = echarts.init(pieDom);

    this.request.get("/echarts/members").then(res => {

      pieOption.series[0].data = [
        {name: "第一季度", value: res.data[0]},
        {name: "第二季度", value: res.data[1]},
        {name: "第三季度", value: res.data[2]},
        {name: "第四季度", value: res.data[3]},
      ]
      pieChart.setOption(pieOption)
    })

  }

}

</script>

<style scoped>

</style>